Thanks to an active offseason, the Bears have a lot of depth along the defensive line. The club picked defensive tackle Stephen Paea in the second round of the NFL Draft, and they've added former first-round picks Vernon Gholston and Amobi Okoye.
But an undrafted rookie is turning heads and consistently making plays.
And he's from a smaller school with a reputation for developing pass rushers.
Undrafted rookie Mario Addison hails from Troy University, and he's hoping to be the latest pass rusher to come out of that Alabama school.
"One thing about Troy, we produce defensive ends," said Addison. "The coaches work with us, day after day, to make us rush men."
New York Giants defensive end Osi Umenyiora and Dallas Cowboys linebacker DeMarcus Ware both played at Troy.
Addison has distinguished himself with an explosive first step and his flexibility. With former Northwestern defensive end Corey Wootton sidelined after a knee scope, Addison is competing to earn the extra snaps. He's mostly going up against Gholston, and he currently has the edge.
"When [Wootton] went down, I was like, 'Ah man. I hate to see good players go down.' But I know when he went down, coach was looking for somebody to step up," Addison said. "I said, 'This is my opportunity to show what I'm about, because I know coach would give me more reps, if he put me in that second spot, which he did."
Okoye had the only two sacks in the preseason opener against the Bills. But Addison was largely responsible for the first one, flushing the quarterback out of the pocket and toward the sideline, where Okoye was the nearest defender in pursuit.